Table of Contents
Advertisement
KX-FP121AL / KX-FM131AL
9.4.
SCHEMATIC DIAGRAM (OPERATION CIRCUIT)
5V
to Digital
0V
CN301
R303
RESET
11
180
KRXD
10
R304
KTXD
9
180
R308
KSCLK
8
R305
180
KLATCH
7
180
R309
KSTART
6
180
+5V
+5V
5
GND
4
R301
JOG1
3
1 JOG1
470 R302
JOG2
2
2 JOG2
470
FG
1
3 NC
4 GND
SW351
JOG DIAL
SW301
VOL DOWN
SW302
VOL UP
SW303
HELP
SW304
CN401
HOOK
1
GND
2
R306
0
R310
0
R311
0
R312
0
R313
REDIAL/PAUSE
MUTE
9
PROGRAM
ONE 3,6
START/SET/COPY
SW305
SW309
SW313
SW317
SW321
SW325
STOP
6
3
8
MENU
LOWER
SW306
SW310
SW314
SW318
SW322
SW326
SP-PHONE
5
2
0
RESOLUTION
ONE 2,5
SW307
SW311
SW315
SW319
SW323
SW327
4
1
QUICK SCAN
ONE 1,4
#
7
SW308
SW312
SW316
SW320
SW324
SW328
SW401
LCD CONTRAST
+5V
R307
180
5V
0V
IC301
17
30
VDD
RESET
33
40
TXD
VDD
32
6
RXD
LED9
31
5
SCLK
LED8
34
23
LATCH
RS
35
24
START
R/W
42
25
KIN0
E
3
26
KIN1
D4
7
27
KIN2
D5
8
28
KIN3
D6
11
29
0
KIN4
D7
R314
0
12
22
KIN5
LED1
13
36
R315
0
KIN6
LED2
14
37
R316
0
KIN7
LED3
43
38
KSL0
LED4
44
41
KSL1
LED5
1
2
KSL2
LED6
10
4
IQ FAX
KSL3
LED7
19
9
XLD13
LED10
15
16
XLD12
LED11
18
20
SW329
GND
XLD14
39
21
GND
XLD15
SW330
3
1
CALLER ID
4
2
SW331
DOCUMENT
SET
SENSOR
AUTO ANSWER
SW332
PLAY
ERASE
MESSAGES
SW333
SW335
RECORD
SW334
+5V
202
+5V
+5V
+5V
5V
0V
+5V +5V +5V +5V
0V
LED: ON
5V
LED: OFF
R342
0
+5V
+5V
R337
NC
NEW MESSAGES
R329
220
R331
3
1
3
1
220
MONITOR
4
2
4
2
R330
COVER
DOCUMENT
330
SENSOR
TOP
SENSOR
+5V
TO HOOK
CN303
R323
1 HOOK
100
2 GND
to LCD
Not Used
CN302
10 GND
9 +5V
8 VO
7 RS
6 R/W
to COG
5 E
4 D4
3 D5
2 D6
1 D7
CN304
1
GND
2
+5V
3
V0
4
RS
5
R/W
6
E
7
D0
to COB
8
D1
9
D2
10 D3
11 D4
R343
12 D5
0
+5V
13 D6
14 D7
LED304
NC
LED302
AUTO ANSWER
LED303
LED301
JJ301
0
R332
NC
JJ302
0
R333
NC
JJ303
NC
R334
NC
( ): NOT USED
Advertisement
Table of Contents
Troubleshooting
